Move device/core files to device/base directory.

device/core/mock_device_client.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
-#define DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
-
-#include <memory>
-
-#include "device/core/device_client.h"
-
-namespace device {
-
-class HidService;
-class MockHidService;
-class MockUsbService;
-class UsbService;
-
-class MockDeviceClient : device::DeviceClient {
- public:
-  MockDeviceClient();
-  ~MockDeviceClient() override;
-
-  // device::DeviceClient implementation:
-  UsbService* GetUsbService() override;
-  HidService* GetHidService() override;
-
-  // Accessors for the mock instances.
-  MockHidService* hid_service();
-  MockUsbService* usb_service();
-
- private:
-  std::unique_ptr<MockHidService> hid_service_;
-  std::unique_ptr<MockUsbService> usb_service_;
-};
-
-}  // namespace device
-
-#endif  // DEVICE_CORE_MOCK_DEVICE_CLIENT_H_